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To Learn Boats and figure out all the currents related Math 5 short strategies

To Learn Boats and figure out all the currents related Math  5 short strategies

 

In favor of a stream of 10 km per hour And two kilometers against the stream .. What is the velocity of the stream?
01. technique: = stream velocity (the velocity of the flow in favor of the boat – the boat against the stream velocity) / 2
= (10 – 2) / 2
= 4 km

Rule II: A boat in favor of a stream of 8 km per hour And 4 km per hour against the stream Said. What is the velocity of the boat?
02. technique: the boat speed = (+ currents in favor of the speed of the boat, the boat against the stream velocity) / 2
= (8 + 4) / 2
= 6 km

Rule 3: Boats and stream velocity of 10 km per hour, respectively, And 5 km .. River 45 km How much time does it take to go on the way back?
Answer: in favor of the bloodstream naukarabega = (10 + 5) = 15 km Boats against the stream velocity = (10-5) = 5 km
03. technique: Total Time = [(total distance / in favor of the velocity) + (total distance / upstream speed)] = [(45/15) + (45/5)] 3 + 9 =
= 1 hour

Rule 4: A boatman in favor of the running 5 kilometers in two hours 4 hours and returned to the first position. Its total
What is the average speed per trip?
04. technique: average speed = (total distance / total time)
= (5 + 5) / (2 + 4)
= 5/3 mile

 

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2 comments

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  2. Thanks for the best lessons.

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